1. # df -h -t btrfs
2. Filesystem      Size  Used Avail Use% Mounted on
3. /dev/sda         55T   13T   21T  37% /srv/dev-disk-by-uuid-2c1a5edc-a624-49a4-8a54-222c61d54386
4. # btrfs fi show
5. Label: 'data'  uuid: 2c1a5edc-a624-49a4-8a54-222c61d54386
6.         Total devices 5 FS bytes used 11.97TiB
7.         devid    1 size 10.91TiB used 4.01TiB path /dev/sda
8.         devid    2 size 10.91TiB used 4.01TiB path /dev/sdb
9.         devid    3 size 10.91TiB used 4.01TiB path /dev/sdc
10.         devid    4 size 10.91TiB used 4.01TiB path /dev/sdd
11.         devid    5 size 10.91TiB used 4.01TiB path /dev/sde
12.  
13. # btrfs device stats /srv/dev-disk-by-uuid-2c1a5edc-a624-49a4-8a54-222c61d54386/
14. [/dev/sda].write_io_errs    0
15. [/dev/sda].read_io_errs     0
16. [/dev/sda].flush_io_errs    0
17. [/dev/sda].corruption_errs  0
18. [/dev/sda].generation_errs  0
19. [/dev/sdb].write_io_errs    0
20. [/dev/sdb].read_io_errs     0
21. [/dev/sdb].flush_io_errs    0
22. [/dev/sdb].corruption_errs  0
23. [/dev/sdb].generation_errs  0
24. [/dev/sdc].write_io_errs    0
25. [/dev/sdc].read_io_errs     0
26. [/dev/sdc].flush_io_errs    0
27. [/dev/sdc].corruption_errs  0
28. [/dev/sdc].generation_errs  0
29. [/dev/sdd].write_io_errs    0
30. [/dev/sdd].read_io_errs     0
31. [/dev/sdd].flush_io_errs    0
32. [/dev/sdd].corruption_errs  0
33. [/dev/sdd].generation_errs  0
34. [/dev/sde].write_io_errs    0
35. [/dev/sde].read_io_errs     0
36. [/dev/sde].flush_io_errs    0
37. [/dev/sde].corruption_errs  0
38. [/dev/sde].generation_errs  0
39.  
40. # btrfs filesystem df /srv/dev-disk-by-uuid-2c1a5edc-a624-49a4-8a54-222c61d54386/
41. Data, RAID6: total=12.00TiB, used=11.95TiB
42. System, RAID1C3: total=8.00MiB, used=976.00KiB
43. Metadata, RAID1C3: total=19.00GiB, used=17.90GiB
44. GlobalReserve, single: total=512.00MiB, used=0.00B
45.  
46. # btrfs scrub status /srv/dev-disk-by-uuid-2c1a5edc-a624-49a4-8a54-222c61d54386/
47. UUID:             2c1a5edc-a624-49a4-8a54-222c61d54386
48. Scrub started:    Tue May  9 08:23:23 2023
49. Status:           finished
50. Duration:         121:07:41
51. Total to scrub:   12.00TiB
52. Rate:             28.85MiB/s
53. Error summary:    no errors found
54.